Fig 1.
Flow chart of patient selection from the Registry for Catastrophic Illness Patient Database (RCIPD).
ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification; NSCLC, non-small cell lung cancer.
Table 1.
Demographic and clinical characteristics of patients in the matched (n = 4,182) cohorts.
Fig 2.
Subgroup analysis of adjusted hazard ratios (HRs) of risk factors for metformin-related mortality in the matched cohorts.